Allocate my payments please

I have two cell phone contracts with MTN. My debit orders for both cell numbers did not go through in February the 20th. I made online payments on the 29th of February 2020 for both accounts. I am struggling since then for the payments to be allocated to my account. I cannot count how may times I called them to sort out this issue. I just get a reference number, but then my line gets suspended again and again and I have to call again and again. Apparently they went on a new system and the funds are still on the old system. That is not my problem. Now they tell me my account is in arears. My lines are suspended again. This is not acceptable.